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Kalyptea aceras
Kalyptea aceras Manum and Cookson, 1964
Now Caligodinium. Originally Kalyptea, subsequently (and now) Caligodinium, thirdly Pareodinia.
Tax. sr. synonym of Caligodinium amiculum Drugg, 1970, according to Heilmann-Clausen, 1985. Lentin and Williams, 1989, retained Caligodinium amiculum as a separate species.
Holotype: Manum and Cookson, 1964, pl.6, fig.9
Locus typicus: Ellef Ringnes Island, Arctic Canada
Stratum typicum: Cenomanian
Original diagnosis: Manum and Cookson, 1964, p.27
Shell oval without horns or appendages, enclosed in a delicate, veil-like covering which extends beyond the shell to varying widths Shell-wall c. 2 ,u thick, its inner surface ornamented by a network composed of fairly regular meshes c. 1 Á across. A break present in most examples near one end of the shell is indicative of an apical archeopyle.
Dimensions: Holotype: shell 80 x 100 Ám, overall 110 x 130 Ám. Range: shell 70-80 x 90-105 Ám.
Now Caligodinium. Originally Kalyptea, subsequently (and now) Caligodinium, thirdly Pareodinia.
Tax. sr. synonym of Caligodinium amiculum Drugg, 1970, according to Heilmann-Clausen, 1985. Lentin and Williams, 1989, retained Caligodinium amiculum as a separate species.
Holotype: Manum and Cookson, 1964, pl.6, fig.9
Locus typicus: Ellef Ringnes Island, Arctic Canada
Stratum typicum: Cenomanian
Original diagnosis: Manum and Cookson, 1964, p.27
Shell oval without horns or appendages, enclosed in a delicate, veil-like covering which extends beyond the shell to varying widths Shell-wall c. 2 ,u thick, its inner surface ornamented by a network composed of fairly regular meshes c. 1 Á across. A break present in most examples near one end of the shell is indicative of an apical archeopyle.
Dimensions: Holotype: shell 80 x 100 Ám, overall 110 x 130 Ám. Range: shell 70-80 x 90-105 Ám.